if TIME TRAVEL is possible, is it more DANGEROUS to go back in time or go jump to the future?

Some say it may be able to go back in time but, not into the future .

The future would be more dangerous because it is unknown. You could have a pretty good idea what you'd be getting into in the past.

Back,
you could wipe yourself out of existance, or any number of people which could lead to things like cures or new technology being invented. Imagine you you went back in time and took J.Smiths ride before he could get into the carriage, he may not then bump into the woman that would have eventually become his wife. They would never meet and their descendant that would have found a cure to small pox never born, small pox then wipes out hundreds of thousands of people.
Going into the future may have the same effect but it would make a blind bit of difference to us.

I would say the future because we can look back on history and know what the circumstances would be like. Just a thought.

it's more normal to stick with the present. living in the past is the option of the sad, while the future can be even less exciting...

People in the future would think we were retarded. People in the past would think we were genius's.

Personally, I reckon it would be more dangerous to travel back in time due to the 'ripple-effect'. If you travelled back in time, the smallest action you make, such as squashing a mosquito could have massive repercussions for the future. What if the mosquito would have gone on to bite someone and cause malaria, but by killing them it is no longer able to do this? What if this person, now given a reprieve, goes onto murder someone and so on...

The world you return to could be altered beyond recognition.

I think it is more Dangerous to jump into the future, because we know what to expect if we go back in time, but do we know what to expect in the future?

Physicist state a possibility of going into the future, but not back in time. It is impossible to detail the location of every particle and it's location in the past to re-enact that setting. Basically it is impossible because no once recorded this information to begin with; and even if we started to do so, it would not be possible with our technology today. Brian Greene's "Fabric of the Cosmos" addresses this issue nicely in one of the chapters.